[nvptx] Ignore c++ exceptions
The nvptx port can't support exceptions using sjlj, because ptx does not support sjlj. However, default_except_unwind_info still returns UI_SJLJ, even even if we configure with --disable-sjlj-exceptions, because UI_SJLJ is the fallback option. The reason default_except_unwind_info doesn't return UI_DWARF2 is because DWARF2_UNWIND_INFO is not defined in defaults.h, because INCOMING_RETURN_ADDR_RTX is not defined, because there's no ptx equivalent. Testcase libgomp.c++/for-15.C currently doesn't compile unless fno-exceptions is added because: - it tries to generate sjlj exception handling code, and - it tries to generate exception tables using label-addressed .byte sequence. Ptx doesn't support generating random data at a label, nor being able to load/write data relative to a label. This patch fixes the first problem by using UI_TARGET for nvptx. The second problem is worked around by generating all .byte sequences commented out. It would be better to have a narrower workaround, and define TARGET_ASM_BYTE_OP to "error: .byte unsupported " or some such. This patch does not enable exceptions for nvptx, it merely allows c++ programs to run correctly if they do no use exception handling. Build and reg-tested on x86_64 with nvptx accelerator. 2018-08-02 Tom de Vries <tdevries@suse.de> PR target/86660 * common/config/nvptx/nvptx-common.c (nvptx_except_unwind_info): New function. Return UI_TARGET unconditionally. (TARGET_EXCEPT_UNWIND_INFO): Redefine to nvptx_except_unwind_info. * config/nvptx/nvptx.c (TARGET_ASM_BYTE_OP): Emit commented out '.byte'. * testsuite/libgomp.oacc-c++/routine-1-auto.C: Remove -fno-exceptions. * testsuite/libgomp.oacc-c++/routine-1-template-auto.C: Same. * testsuite/libgomp.oacc-c++/routine-1-template-trailing-return-type.C: Same. * testsuite/libgomp.oacc-c++/routine-1-template.C: Same. * testsuite/libgomp.oacc-c++/routine-1-trailing-return-type.C: Same. * testsuite/libgomp.oacc-c-c++-common/routine-1.c: Same. From-SVN: r263265
This commit is contained in:
Tom de Vries
Tom de Vries
parent
007b11a588
commit
77e0a97acf
10 changed files with 31 additions and 12 deletions
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@ -1,3 +1,11 @@
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2018-08-02 Tom de Vries <tdevries@suse.de>
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PR target/86660
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* common/config/nvptx/nvptx-common.c (nvptx_except_unwind_info): New
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function. Return UI_TARGET unconditionally.
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(TARGET_EXCEPT_UNWIND_INFO): Redefine to nvptx_except_unwind_info.
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* config/nvptx/nvptx.c (TARGET_ASM_BYTE_OP): Emit commented out '.byte'.
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2018-08-02 Richard Sandiford <richard.sandiford@arm.com>
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* genemit.c (print_overload_test): Fix typo.
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@ -30,10 +30,19 @@ along with GCC; see the file COPYING3. If not see
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#include "opts.h"
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#include "flags.h"
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enum unwind_info_type
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nvptx_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
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{
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return UI_TARGET;
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}
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#undef TARGET_HAVE_NAMED_SECTIONS
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#define TARGET_HAVE_NAMED_SECTIONS false
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#undef TARGET_DEFAULT_TARGET_FLAGS
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#define TARGET_DEFAULT_TARGET_FLAGS MASK_ABI64
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#undef TARGET_EXCEPT_UNWIND_INFO
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#define TARGET_EXCEPT_UNWIND_INFO nvptx_except_unwind_info
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struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
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@ -6051,6 +6051,9 @@ nvptx_can_change_mode_class (machine_mode, machine_mode, reg_class_t)
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#undef TARGET_HAVE_SPECULATION_SAFE_VALUE
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#define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed
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#undef TARGET_ASM_BYTE_OP
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#define TARGET_ASM_BYTE_OP "// .byte "
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struct gcc_target targetm = TARGET_INITIALIZER;
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#include "gt-nvptx.h"
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@ -1,3 +1,14 @@
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2018-08-02 Tom de Vries <tdevries@suse.de>
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PR target/86660
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* testsuite/libgomp.oacc-c++/routine-1-auto.C: Remove -fno-exceptions.
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* testsuite/libgomp.oacc-c++/routine-1-template-auto.C: Same.
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* testsuite/libgomp.oacc-c++/routine-1-template-trailing-return-type.C:
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Same.
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* testsuite/libgomp.oacc-c++/routine-1-template.C: Same.
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* testsuite/libgomp.oacc-c++/routine-1-trailing-return-type.C: Same.
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* testsuite/libgomp.oacc-c-c++-common/routine-1.c: Same.
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2018-08-01 Cesar Philippidis <cesar@codesourcery.com>
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Thomas Schwinge <thomas@codesourcery.com>
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@ -1,7 +1,5 @@
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// Routine with "auto" return type.
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// { dg-additional-options "-fno-exceptions" }
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#define TEMPLATE
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#define TYPE int
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#define RETURN_1 auto
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// Templated routine with "auto" return type.
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// { dg-additional-options "-fno-exceptions" }
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#define TEMPLATE template<typename TYPE>
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#define RETURN_1 auto
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#define RETURN_2
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// Templated routine using trailing return type syntax.
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// { dg-additional-options "-fno-exceptions" }
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#define TEMPLATE template<typename TYPE>
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#define RETURN_1 auto
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#define RETURN_2 -> TYPE
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// Templated routine.
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// { dg-additional-options "-fno-exceptions" }
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#define TEMPLATE template<typename TYPE>
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#define RETURN_1 TYPE
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#define RETURN_2
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// Routine using trailing return type syntax.
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// { dg-additional-options "-fno-exceptions" }
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#define TEMPLATE
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#define TYPE int
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#define RETURN_1 auto
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// { dg-additional-options "-fno-exceptions" }
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// Defaults, if not "#include"d from ../libgomp.oacc-c++/routine-1-*.C.
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#ifndef TEMPLATE
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# define TEMPLATE
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